linux-kernel - [PATCH net-next] net: tap: use eth_type_vlan in tap_get

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Date:   Wed, 13 Jan 2021 23:37:18 -0800
From:   menglong8.dong@...il.com
To:     kuba@...nel.org
Cc:     davem@...emloft.net, netdev@...r.kernel.org,
        linux-kernel@...r.kernel.org,
        Menglong Dong <dong.menglong@....com.cn>
Subject: [PATCH net-next] net: tap: use eth_type_vlan in tap_get_user

From: Menglong Dong <dong.menglong@....com.cn>

Replace the check for ETH_P_8021Q and ETH_P_8021AD in
tap_get_user with eth_type_vlan.

Signed-off-by: Menglong Dong <dong.menglong@....com.cn>
---
 drivers/net/tap.c | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/drivers/net/tap.c b/drivers/net/tap.c
index 3c652c8ac5ba..cf9197fe3bb6 100644
--- a/drivers/net/tap.c
+++ b/drivers/net/tap.c
@@ -713,8 +713,7 @@ static ssize_t tap_get_user(struct tap_queue *q, void *msg_control,
 	skb_probe_transport_header(skb);
 
 	/* Move network header to the right position for VLAN tagged packets */
-	if ((skb->protocol == htons(ETH_P_8021Q) ||
-	     skb->protocol == htons(ETH_P_8021AD)) &&
+	if (eth_type_vlan(skb->protocol) &&
 	    __vlan_get_protocol(skb, skb->protocol, &depth) != 0)
 		skb_set_network_header(skb, depth);
 
-- 
2.25.1